/**
 * Copyright (c) 2008, Piercarlo Slavazza
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * The name of Piercarlo Slavazza cannot be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Piercarlo Slavazza ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Piercarlo Slavazza BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.libapml;

import java.net.URI;
import java.util.List;

import org.apache.lucene.store.Directory;

import com.libapml.util.Helper;

public class LuceneDocument implements Closable {

	private Directory directory;
	private URI document;
	
	private long size = -1;
	
	private ApmlIndex index;
	
	private boolean closed = false;
	
	protected LuceneDocument(Directory directory, URI document, ApmlIndex index) {

		this.directory = directory;
		this.document = document;
		this.index = index;
		
	}
	
	public Directory getDirectory() {
		return directory;
	}
	
	public URI getDocument() {
		return document;
	}
	
	protected synchronized void close() {
		
		if (!closed) {
			size = 0;
			List<ConceptOccurrenceInDocument> terms = index.getConceptOccurrencies(this); 
			for (ConceptOccurrenceInDocument conceptOccurrenceInDocument : terms)
				size += conceptOccurrenceInDocument.getOccurrencies();

			closed = true;
		}
		
	}
	
	public synchronized long getSize() {
		
		Helper.checkIsClosed(this);
		
		return size;
	}

	@Override
	public boolean equals(Object obj) {
		
		boolean areEquals = false;
		
		if (obj instanceof LuceneDocument) {
			LuceneDocument target = (LuceneDocument) obj;
			
			areEquals = 
				directory.equals(target.getDirectory()) && document.equals(target.getDocument());
		}
		
		return areEquals;
	}

	@Override
	public int hashCode() {
		return document.hashCode() + directory.hashCode();
	}
	
	protected ApmlIndex getIndex() {
		return index;
	}

	public synchronized boolean isClosed() {
		return closed;
	}
}
